It is a move endorsed by Ian Acheson, a former prison governor whose 2016 review of Islamist extremism led to the introduction of SCs. He believes Abedi should be kept in total isolation, even if it 'turns him mad'. Speaking to the Mail last night, he said: 'We have to be blunt here. Some people cannot be redeemed and they will not stop as a threat to staff until they are physically incapable. Instead of pandering to the human rights of such offenders we must reorientate our approach to containment, isolation and control for the 'spectacular few'. 'Abedi is one of those. He made a free choice to murder dozens of innocent people. His rights must always be subordinate to those looking after him.'